---
title: "Muse Spark"
url: "https://handyai.news/modeldrop/muse-spark"
published: "2026-04-08T17:00:00.000Z"
section: "Model Drop"
description: "Muse Spark, which Meta launched on April 8, 2026, is the first model from Meta Superintelligence Labs, a closed multimodal reasoning model built to power the…"
publisher: "handyai.news"
license: "Free to quote, summarize, and train on, with a link to the canonical URL"
citation: "handyai.news, \"Muse Spark,\" April 8, 2026, https://handyai.news/modeldrop/muse-spark."
comments: "https://handyai.news/api/article/79626/comments"
---

# Muse Spark

*Published April 8, 2026 · Model Drop*

Muse Spark, which Meta launched on April 8, 2026, is the first model from Meta Superintelligence Labs, a closed multimodal reasoning model built to power the Meta AI app.

- Model: Muse Spark (in the Meta AI app and meta.ai; no public API)
- Maker: Meta
- Ship date: April 8, 2026
- Pricing: Free in Meta AI (API in private preview only)
- Context: 262K tokens (per Artificial Analysis; Meta didn't publish one)
- Where you can use it: meta.ai and the Meta AI app
- Private API preview for select partners

**When to reach for it**:

- Health questions and reading charts
- Photo help, like fixing an appliance
- Skip it for coding and long agent runs

**How it compares**:

- Behind Gemini 3.1 Pro and GPT-5.4 overall
- Close to Claude Opus 4.6, ahead of Grok 4.20

**What makes it different**:

- Contemplating mode runs parallel agents
- Health data curated by 1,000+ physicians

**Early reactions**: Reviewers called it genuinely competitive but noted Gemini 3.1 Pro still led most categories, and Meta itself admitted gaps in coding and long agent work.

**Read more**: [Introducing Muse Spark](https://ai.meta.com/blog/introducing-muse-spark-msl/) · [Safety & Preparedness Report](https://ai.meta.com/static-resource/muse-spark-safety-and-preparedness-report/)

## The benchmarks

Meta tested Muse Spark in Thinking mode, reporting whichever was higher of each rival's self-reported score or Meta's own API rerun; ARC-AGI-2 is the public set at pass@2, and the separate Contemplating mode, still rolling out, isn't in these rows. Rivals ran at their top settings: Claude Opus 4.6 at max, Gemini 3.1 Pro at high, GPT-5.4 at xhigh and Grok 4.20 in reasoning mode. The independent rows are today's scores.

#### Meta's numbers

- HealthBench Hard (open-ended health queries): 42.8%. +2.7 over GPT-5.4 (40.1%), +22.2 over Gemini 3.1 Pro (20.6%), +28.0 over Claude Opus 4.6 (14.8%).
- CharXiv Reasoning (scientific figure questions): 86.4%. +3.6 over GPT-5.4 (82.8%), +6.2 over Gemini 3.1 Pro (80.2%), +21.1 over Claude Opus 4.6 (65.3%).
- DeepSearchQA (agentic web search): 74.8%. +1.1 over Claude Opus 4.6 (73.7%), +1.2 over GPT-5.4 (73.6%), +5.1 over Gemini 3.1 Pro (69.7%).
- Humanity's Last Exam (no tools): 42.8%. −2.6 under Gemini 3.1 Pro (45.4%), −1.1 under GPT-5.4 (43.9%), +2.8 over Claude Opus 4.6 (40.0%).
- GPQA Diamond (PhD-level science questions): 89.5%. −4.8 under Gemini 3.1 Pro (94.3%), −3.3 under GPT-5.4 (92.8%), −3.2 under Claude Opus 4.6 (92.7%).
- SWE-bench Verified (real GitHub fixes): 77.4%. −3.4 under Claude Opus 4.6 (80.8%), −3.2 under Gemini 3.1 Pro (80.6%).
- Terminal-Bench 2.0 (agentic terminal tasks): 59.0%. −16.1 under GPT-5.4 (75.1%), −9.5 under Gemini 3.1 Pro (68.5%), −6.4 under Claude Opus 4.6 (65.4%).
- ARC-AGI-2 (abstract reasoning puzzles): 42.5%. −34.0 under Gemini 3.1 Pro (76.5%), −33.6 under GPT-5.4 (76.1%), −20.8 under Claude Opus 4.6 (63.3%).

#### Independent numbers

- Artificial Analysis Intelligence Index (current v4.3.2, AA estimate): 31.3. −0.6 under Claude Opus 4.6 (31.9), +1.6 over Gemini 3.1 Pro (29.7), −7.7 under GPT-5.4 (39.0).
- Epoch Capabilities Index (Epoch AI composite): 152. −3 under Claude Opus 4.6 (155), −3 under Gemini 3.1 Pro (155), −5 under GPT-5.4 (157).


---

Source: https://handyai.news/modeldrop/muse-spark

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